Nitrogen Saturation of Terrestrial Ecosystems: Some Recent Findings and Their Implications for Our Conceptual Framework

2007 ◽  
pp. 99-109 ◽  
Author(s):  
Bridget A. Emmett
Keyword(s):  
Conceptual Framework ◽  
Nitrogen Saturation ◽  
Terrestrial Ecosystems

Nitrogen saturation of terrestrial ecosystems

1988 ◽  
Vol 54 (3-4) ◽  
pp. 185-197 ◽  
Author(s):  
Göran I. Ågren ◽  
Ernesto Bosatta
Keyword(s):  
Nitrogen Saturation ◽  
Terrestrial Ecosystems

scholarly journals Terrestrial ecosystems buffer inputs through storage and recycling of elements

2021 ◽  
Author(s):  
Marie Spohn ◽  
Felipe Aburto ◽  
Todd A. Ehlers ◽  
Nina Farwig ◽  
Patrick J. Frings ◽  
...  
Keyword(s):  
Environmental Change ◽  
Conceptual Framework ◽  
Community Dynamics ◽  
Current Knowledge ◽  
Terrestrial Ecosystems ◽  
Future Research ◽  
Plant Community Dynamics ◽  
Plant Soil ◽  
Soil Systems ◽  
Storage Pools

AbstractThis study presents a conceptual framework of buffering through storage and recycling of elements in terrestrial ecosystems and reviews the current knowledge about storage and recycling of elements in plants and ecosystems. Terrestrial ecosystems, defined here as plant-soil systems, buffer inputs from the atmosphere and bedrock through storage and recycling of elements, i.e., they dampen and delay their responses to inputs. Our framework challenges conventional paradigms of ecosystem resistance derived from plant community dynamics, and instead shows that element pools and fluxes have an overriding effect on the sensitivity of ecosystems to environmental change. While storage pools allow ecosystems to buffer variability in inputs over short to intermediate periods, recycling of elements enables ecosystems to buffer inputs over longer periods. The conceptual framework presented here improves our ability to predict the responses of ecosystems to environmental change. This is urgently needed to define thresholds which must not be exceeded to guarantee ecosystem functioning. This study provides a framework for future research to explore the extent to which ecosystems buffer variability in inputs.

scholarly journals Shining light on recent advances in microbial mercury cycling

FACETS ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 858-879 ◽  
Author(s):  
Daniel S. Grégoire ◽  
Alexandre J. Poulain
Keyword(s):  
Conceptual Framework ◽  
Environmental Changes ◽  
Terrestrial Ecosystems ◽  
Mercury Cycling ◽  
Recent Advances ◽  
Oxidation Reduction ◽  
New Findings ◽  
The Face ◽  
Global Pollutant ◽  
Analytical Tools

Mercury (Hg) is a global pollutant emitted primarily as gaseous Hg0 that is deposited in aquatic and terrestrial ecosystems following its oxidation to HgII. From that point, microbes play a key role in determining Hg’s fate in the environment by participating in sequestration, oxidation, reduction, and methylation reactions. A wide diversity of chemotrophic and phototrophic microbes occupying oxic and anoxic habitats are known to participate directly in Hg cycling. Over the last few years, new findings have come to light that have greatly improved our mechanistic understanding of microbe-mediated Hg cycling pathways in the environment. In this review, we summarize recent advances in microbially mediated Hg cycling and take the opportunity to compare the relatively well-studied chemotrophic pathways to poorly understood phototrophic pathways. We present how the use of genomic and analytical tools can be used to understand Hg transformations and the physiological context of recently discovered cometabolic Hg transformations supported in anaerobes and phototrophs. Finally, we propose a conceptual framework that emphasizes the role that phototrophs play in environmental Hg redox cycling and the importance of better characterizing such pathways in the face of the environmental changes currently underway.

Global Warming and Terrestrial Ecosystems: A Conceptual Framework for Analysis

BioScience ◽  
2000 ◽  
Vol 50 (10) ◽  
pp. 871 ◽  
Author(s):  
GAIUS R. SHAVER ◽  
JOSEP CANADELL ◽  
F. S. CHAPIN ◽  
JESSICA GUREVITCH ◽  
JOHN HARTE ◽  
...  
Keyword(s):  
Global Warming ◽  
Conceptual Framework ◽  
Terrestrial Ecosystems

Nitrogen, organic carbon and sulphur cycling in terrestrial ecosystems: linking nitrogen saturation to carbon limitation of soil microbial processes

2013 ◽  
Vol 115 (1-3) ◽  
pp. 33-51 ◽  
Author(s):  
Jiří Kopáček ◽  
Bernard J. Cosby ◽  
Christopher D. Evans ◽  
Jakub Hruška ◽  
Filip Moldan ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Nitrogen Saturation ◽  
Terrestrial Ecosystems ◽  
Microbial Processes ◽  
Carbon Limitation ◽  
Soil Microbial ◽  
Sulphur Cycling

Evaluating research in developmental disabilities: a conceptual framework for reviewing treatment outcomes

1999 ◽  
Vol 41 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Charlene Butler ◽  
Henry Chambers ◽  
Murray Goldstein ◽  
Susan Harris ◽  
Judy Leach ◽  
...  
Keyword(s):  
Developmental Disabilities ◽  
Conceptual Framework ◽  
Treatment Outcomes

Understanding Why Older People Develop a Wish to Die

Crisis ◽  
2011 ◽  
Vol 32 (4) ◽  
pp. 204-216 ◽  
Author(s):  
M. L. Rurup ◽  
H. R. W. Pasman ◽  
J. Goedhart ◽  
D. J. H. Deeg ◽  
A. J. F. M. Kerkhof ◽  
...  
Keyword(s):  
Older People ◽  
Cohort Studies ◽  
Conceptual Framework ◽  
Life Events ◽  
Traumatic Life Events ◽  
Quantitative Studies ◽  
Wish To Die ◽  
Open Coding ◽  
Death Wishes ◽  
Depth Interviews

Background: Quantitative studies in several European countries showed that 10–20% of older people have or have had a wish to die. Aims: To improve our understanding of why some older people develop a wish to die. Methods: In-depth interviews with people with a wish to die (n = 31) were carried out. Through open coding and inductive analysis, we developed a conceptual framework to describe the development of death wishes. Respondents were selected from two cohort studies. Results: The wish to die had either been triggered suddenly after traumatic life events or had developed gradually after a life full of adversity, as a consequence of aging or illness, or after recurring depression. The respondents were in a situation they considered unacceptable, yet they felt they had no control to change their situation and thus progressively “gave up” trying. Recurring themes included being widowed, feeling lonely, being a victim, being dependent, and wanting to be useful. Developing thoughts about death as a positive thing or a release from problems seemed to them like a way to reclaim control. Conclusions: People who wish to die originally develop thoughts about death as a positive solution to life events or to an adverse situation, and eventually reach a balance of the wish to live and to die.

NetCO2andH2Ofluxes of terrestrial ecosystems

1999 ◽  
Vol 13 (3) ◽  
pp. 751-760 ◽  
Author(s):  
Nina Buchmann
Keyword(s):  
Terrestrial Ecosystems
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